List of Intel Pentium II processors

The Pentium II is a sixth-generation CPU from Intel targeted at the consumer market.

Desktop processors

"Klamath" (350 nm)

• All models support: MMX
• L2 cache is off-die and runs at 50% CPU speed
• Part numbers prefixed with a B are for boxed retail CPUs

Model	Clock rate	L2 cache	FSB	Mult.	Voltage	TDP	Socket	Release date	Release price (USD)
Pentium II 233	233 MHz	512 KB	66 MT/s	3.5×	2.8 V	34.8 W	Slot 1	May 7, 1997	$636
Pentium II 266	267 MHz	512 KB	66 MT/s	4×	2.8 V	38.2 W	Slot 1	May 7, 1997	$775
Pentium II 300	300 MHz	512 KB	66 MT/s	4.5×	2.8 V	43 W	Slot 1	May 7, 1997	$1981

"Deschutes" (250 nm)

• All models support: MMX
• L2 cache is off-die and runs at 50% CPU speed
• The Pentium II OverDrive is a Deschutes Pentium II core packaged for Socket 8 operation. It comes with 512 KB of off-die full-speed L2 cache, which makes it very similar to the Pentium II Xeon.

Model	Clock rate	L2 cache	FSB	Mult.	Voltage	TDP	Socket	Release date	Release price (USD)
Pentium II 266	267 MHz	512 KB	66 MT/s	4×	2.0 V	16.8 W	Slot 1	January 26, 1998[1]
Pentium II 300	300 MHz	512 KB	66 MT/s	4.5×	2.0 V	18.6 W	Slot 1	January 26, 1998[1]
Pentium II 333	333 MHz	512 KB	66 MT/s	5×	2.0 V	20.6 W	Slot 1	January 26, 1998[1]	$722
Pentium II Overdrive[4][5]	333 MHz	512 KB	66 MT/s	5×	3.3 V		Socket 8	August 10, 1998	$599
Pentium II 350	350 MHz	512 KB	100 MT/s	3.5×	2.0 V	21.5 W	Slot 1	April 15, 1998[6]	$621
Pentium II 400	400 MHz	512 KB	100 MT/s	4×	2.0 V	24.3 W	Slot 1	April 15, 1998[6]	$824
Pentium II 450	450 MHz	512 KB	100 MT/s	4.5×	2.0 V	27.1 W	Slot 1	August 24, 1998[7]	$669

Mobile processors

"Tonga" (250 nm)

• All models support: MMX
• L2 cache is off-die and runs at 50% CPU speed

Model	Clock rate	L2 cache	FSB	Mult.	Voltage	TDP	Socket	Release date	Release price (USD)
Mobile Pentium II 233	233 MHz	512 KB	66 MT/s	3.5×	1.6 V	9.0 W	MMC-1 MMC-2	April 2, 1998	$542
Mobile Pentium II 266	267 MHz	512 KB	66 MT/s	4×	1.6 V	10.3 W	MMC-1 MMC-2	April 2, 1998	$772
Mobile Pentium II 300	300 MHz	512 KB	66 MT/s	4.5×	1.6 V	11.1 W	MMC-1 MMC-2	September 9, 1998	$710

"Dixon" (250 or 180 nm)

• All models support: MMX
• L2 cache is on-die and runs at 100% CPU speed
• Also known as Pentium II "Performance Enhanced"
• mqbA1 stepping is actually at 180 nm 27.4 million transistors die size 180 mm²

Model	Clock rate	L2 cache	FSB	Mult.	Voltage	TDP	Socket	Release date	Release price (USD)
Mobile Pentium II 266PE	267 MHz	256 KB	66 MT/s	4×	1.6 V	10.3 W	μPGA2 BGA2 MMC-2	January 25, 1999	$187
Mobile Pentium II 300PE	300 MHz	256 KB	66 MT/s	4.5×	1.6 V	11.6 W	μPGA2 BGA2 MMC-2	January 25, 1999	$321
Mobile Pentium II 333	333 MHz	256 KB	66 MT/s	5×	1.6 V	11.8 W	μPGA2 BGA2 MMC-2	January 25, 1999	$465
Mobile Pentium II 366	367 MHz	256 KB	66 MT/s	5.5×	1.6 V	13.1 W	μPGA2 BGA2 MMC-2	January 25, 1999	$696
Mobile Pentium II 400	400 MHz	256 KB	66 MT/s	6×	1.55 or 1.50[8] V	13.1 W	μPGA2 BGA2 MMC-2	June 14, 1999	$530

See also

• List of Intel Pentium processors
• List of Intel Pentium Pro processors
• List of Intel Pentium III processors
• List of Intel processors
• List of microprocessors